American Wood Protection Association
www.awpa.com
Wood Protection Association (UK)
www.wood-protection.org
The International Research Group on Wood Protection
www.irg-wp.com
The Timber Preservers Association of Australia
www.tpaa.com.au
The Western European Institute for Wood Preservation
www.wei-ieo.org
Western Wood Preservers Institute (USA)
www.wwpinstitute.org
Wood Preservative Science Council (USA)
www.woodpreservativescience.org
New Zealand Timber Preservation Council
www.nztpc.co.nz
Wood Preservation Canada
www.woodpreservation.ca
Treated Wood Council (USA)
www.treated-wood.org
Creosote Council (USA)
www.creosotecouncil.org